Reduction of Backscattering Induced Noise by Carrier Suppression in Waveguide-Type Optical Ring Resonator Gyro
Reduction of Backscattering Induced Noise by Carrier Suppression in Waveguide-Type Optical Ring Resonator Gyro
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DOI：
10.1109/jlt.2010.2092751
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发表时间：
2011-01-01
影响因子：
4.7
通讯作者：
Hotate, Kazuo
中科院分区：
文献类型：
--
作者：
Ma, Huilian;He, Zuyuan;Hotate, Kazuo
具有波导型环形谐振器的谐振式微光陀螺（RMOG）是需要小、轻、鲁棒陀螺仪应用的有前途的候选者。在光学无源环形谐振器陀螺中，顺时针光波和逆时针光波在不同频率上进行相位调制，以减小后向散射引起的噪声。然而，这种技术的有效性是由载波抑制水平决定的。本文通过实验研究了载流子抑制电平对带有硅波导谐振腔的RMOG系统陀螺性能的影响。在我们的实验中，同时对连续波和连续波进行载波抑制，以获得更高的总抑制。我们表明，通过优化相位调制的幅度，可以实现高达100 dB的载波抑制。在环长7.9 cm的硅波导环形谐振器中，RMOG在50秒内的偏置稳定性为0.46度/秒。这是迄今为止报道的最好的结果，据我们所知，对于这种尺寸的波导型环形谐振器陀螺。
Resonator micro optic gyro (RMOG) with a waveguide-type ring resonator is a promising candidate for applications requiring small, light and robust gyros. In optical passive ring resonator gyros, clockwise (CW) and counter clockwise (CCW) light-waves are phase-modulated at different frequencies to reduce the backscattering induced noise. The effectiveness of this technique, however, is determined by the carrier suppression level. In this paper, the influence of the carrier suppression level on the gyro performance is examined experimentally for an RMOG system with a silica waveguide resonator. In our experiment, carrier suppression is applied onto both the CW and the CCW lightwaves at the same time to achieve higher total suppression. We show that carrier suppression as high as 100 dB can be achieved by optimizing the amplitude of the phase modulation. A bias stability of 0.46 degrees/s in 50 seconds is demonstrated in an RMOG with a silica waveguide ring resonator having a ring length of 7.9 cm. This is the best result reported to date, to the best of our knowledge, for waveguide-type ring resonator gyros of this size.